Thermal switch and dual filament long life lamp
AssigneeGeneral Electric Company
InventorNicholas Loucaides
Life of this patent
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Abstract
A three-terminal thermal switch having a common connector arm biased against a terminal of fusible material. When the terminal is softened or melted by current, the connector arm is released and moves into contact against a second terminal. Positioned in the base of a long-life dual-filament incandescent light bulb, the switch causes one filament to be energized until it burns out, and then connects the other filament to be energized.
Claims10
A three-terminal switch having a common member biased against a side of a first terminal of fusible material, and a second terminal spaced from said first terminal, said first terminal being subject to melting or deforming upon overcurrent, whereby said common member is urged to move into contact with said second terminal.
Dependencies are inferred from the claim text.